The conquest of a continent
By: by Chase S. Osborn and Stella Brunt Osborn.  Michigan.
Contributors: Osborn, Stella Brunt, 1894-
Publisher: Science press printing company]
Published: 1939
Place of publication: [Lancaster, Pa
Language: eng
Number of pages: 190
Subjects: United States -- Boundaries; Canada -- Boundaries
Notes: Bibliography: p. 139-158.